Facebook have mentioned that the features will be soon available in different regions of the world.

It is very easy to use the video calling features, users just have to tap on the video icon in the top right corner of your chat screen and a video call with start from within the conversation in Messenger. [See the above image]

Lastly Facebook have introduced Sen Money features in Messenger after rolling the web version of the Messenger app. Its seems that Facebook is focusing in mobile platform.